Scissors



Patented May 25, 1926.

narran stares JOHN CLAY CALDWELL. elimini/ir, rnonrnn.

scissons.

Application filed June 14, '1923. Serial No. 645,415?.

This invention relates to cuttingl instruments of the scissor or shear type and the primary object the invention is to provide a pair of scissors or like cutting instrument embodying novel means for mounting the cutting blades, so as to prevent wear thereon, and to permit the ready adjustment thereof relative to one another.

Another prime object of the present invention is the provision of novel independent bearings foreach cutting blade, and novel mea-ns' for permitting the separation of the cutting blades after the cutting operation, so asto preclude undue'nta-rv on the blades and to permit the convenient operation thereof.

LA further prime object of the invention is the provision of a novel compensating screu` for the blades of the scissors and novel means for maintaining the independent bearings of the blades in proper alignment relative to one another.

it. still further object of the present invention is to provide an improved pair of scissors or like cutting instrument of the above character, which will be durable and efiicient in use, one that will be simple and easy to manufacture and one which can be placed upon the marketat a reasonable cost.

'Vith these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a side elevation of the improved pair of cutting scissors constructed in accordance with this invention.

Figure 2 is a transverse section through the pivot point of the scissors.

Figure 3 is a fragmentary side elevation of the improved scissors showing the blades thereof in their fully opened position.

Figure l is a det-ail perspective view of one of the bearings or compensating screw.

Figure 5 is a detail perspective view of one of the clamping screws.

Figure 6 is a detail transverse section through the cutting blades illustrating the position of the blades after the cutting stroke, and

Figure 7 is a detail transverse section through the blades of the scissors illustrating the position of the blades relative to one another during the cutting stroke.

Referring to the drawings detail,

wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates the improved pair of scissors, which embody ings the biadesl() and 11 are normally arranged at au angle to the handles'- which insures the proper positioning of the cutting edges 15 of the blades relative to one another during the cutting operation. By this construction, it can also be seen that as the blades more to their fully closed position, the same will be separated from one another, thus 1preventing undue wear thereon and permitting the easy operation thereof. The relative positions of the blades 10 and 11 during the cutting operation can be readily seen by referring to Figures G and of the drawings.

In order to insure the easy manipula-tion of the blades l provide independentrbean ings for each blade and means for adjusting the blades relative to one another. The novel means for connecting the blades together and for mounting the blades comprises a screwY 2O embodying a relatively laroe 'dat head 21 and a threaded shank 22. It can be seen that the screw 2O is of the machine type. l'lhis screw is adapted to be received in a retaining member 25 which forms an important feature ,of this invention. The retaining member 25 embodies an enlarged disleshaped head 26, which is adapted to be received in a disk-.shaped re'- cess 27 formed in the inner face of the en` largement 111 of the blade 10. An axially disposed stud 27 is formed on the disk 26 and is provided with an axially disposed internally threaded socket 28 for receiving the shank 22 of the clamping .screw 20. It is to be also noted at this point that the shank 22 adjacent to the head 21 of the screw 2O is left plain so as to form a bearing for the blade 10. The outer surface of the stud 27 is provided with male threads 29 and the. stud is threaded into an internally threaded axially disposed recess 30 formed in the enlargement 14 on the cutting blade 11. The @Xtreme Outer se@ 0f the Shank 27 is provided with a screw driver receiving slot $303 which permite the easy holding o1Pv the rfi/mining member egainet movement elurin?,v Jhe adjusting mi the clamping screw 20. It can be seen fm the plef; 2G is first pla s` fr which the sei-ew 20 is threaded inio lerinefl in retaining nieniber en@ hie eeneerneiion prmiiflee e bearing 'for the blade New the blade ll is placed en and rin' edefl. which ie is a hearing here'or 'miie the eujnstingg or rne blade 'll in thereby 'forming neh is killed :in the err. 1 L wgoingg; deseription it een he eeen lni have previa eil en improved cutting' 1"v of eeeptie'ielly durable :nifl simple eenetrnetion, which will "oe easy ro manipulate enel which will entirely elunnee undue weer upon 'he cutting ble/ies thereof.

eed into the rece e x 1e socket 28 le lll (hiesige7 W Changes in details may be made Without 1 'from the splrit er the scope of this l hrengh one blade, the hier -ened hlaee 'lmflned in its inning e disk-eheped reeesfs nner fece, e retaining n'ien'iher nelnfgxng mended .ehenl-r, :i digli-:shaped pleite, he plue being adapted lo lie :'tierl in the reeess o ihe est mentioned blade, the blade having :L threaded opening formed jherein vfor receiving' the Shank of the retaining member, che Shank of che re- 4.

i il H, v. bald-f :Lining member having e. hrended Socket o receive Jehe shank of the clalnprng screw. In testimony whereof I aix my signature.

JOHN CLAY CALDELL. 

